Rescue workers do their job willingly. No one really forces them to (usual exceptions for North Korea et al. apply here). I know an old emergency doctor who once survived a helicopter crash. He still walks with a limp and still flies missions with a helo, even though he is pushing sixty.

It is a specific sort of mentality on their part and frankly my experience with them is that they neither need nor appreciate any white-knighting for their safety. If they wanted a safe job, they could easily switch to pushing papers around, there is no shortage of such jobs in the modern world.